.\" $OpenBSD: SSL_dup.3,v 1.4 2019/06/12 09:36:30 schwarze Exp $
.\"
.\" Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: June 12 2019 $
.Dt SSL_DUP 3
.Os
.Sh NAME
.Nm SSL_dup
.Nd deep copy of an SSL object
.Sh SYNOPSIS
.In openssl/ssl.h
.Ft SSL *
.Fo SSL_dup
.Fa "SSL *ssl"
.Fc
.Sh DESCRIPTION
.Fn SSL_dup
constructs a new
.Vt SSL
object in the same context as
.Fa ssl
and copies much of the contained data from
.Fa ssl
to the new
.Vt SSL
object, but many fields, for example tlsext data, are not copied.
.Pp
As an exception from deep copying, if a session is already established,
the new object shares
.Fa ssl->cert
with the original object.
.Sh RETURN VALUES
.Fn SSL_dup
returns the new
.Vt SSL
object or
.Dv NULL
on failure.
.Sh SEE ALSO
.Xr ssl 3 ,
.Xr SSL_clear 3 ,
.Xr SSL_copy_session_id 3 ,
.Xr SSL_free 3 ,
.Xr SSL_new 3
.Sh HISTORY
.Fn SSL_dup
first appeared in SSLeay 0.8.0 and has been available since
.Ox 2.4 .
